**4. The experiment of cultivating eggplants with biogas residue fibre film**

In order to test the performance differences among the three kinds of biogas residue fibre mulch, black biodegradable mulching added in activated carbon, plastic film and control (without mulching), to cultivate eggplant, a comparative field test through the multiple comparisons for the soil moisture content, soil temperature, weed growth amount and eggplant yield was employed. Performance index of the treatments was shown in table4- 1.


Notes: A,B,C were biogas residue fibre mulch of different grammage, respectively; D was black biodegradable mulching added in activated carbon; E was plastic film.

Table 4-1. Performance index of the treatments

284 Biogas

The rule of optimization based on film performance meeting the agronomic requirement to reduce energy consumption and save raw materials as much as possible was applied to determine the optimum combination of the factors. The result was that when rosin was held at 0.8%, bauxite was held at 4%, wet strength agent was held at 1.8%, beating degree was held at 35 SR°, grammage was held at 80 g/m2, the performance that was dry tensile strength was greater than 30N, wet tensile strength was greater than 12N, the degradation

Based on the above research results, manufacturing technology of the biogas residue fibre

Biogas residue fibre extraction

Cleaning

Fibre screening

Beating

Excipient Function agent

Compounding pulp

Manufacturing film

period was 35 days to 60 days could be obtained, seeing in Fig 3-13.

Fig. 3-14. Manufacturing technology of the biogas residue fibre film

**4. The experiment of cultivating eggplants with biogas residue fibre film** 

In order to test the performance differences among the three kinds of biogas residue fibre mulch, black biodegradable mulching added in activated carbon, plastic film and control (without mulching), to cultivate eggplant, a comparative field test through the multiple comparisons for the soil moisture content, soil temperature, weed growth amount and eggplant yield was employed. Performance index of the treatments was shown in table4- 1.

**3.6 Optimization** 

**3.7 Manufacturing technology** 

film was obtained, seeing Fig 3-14.

#### **4.1 Effect of different treatments on the weed amount**

The effect scene of different treatments on the weed amount in the case of cultivating eggplant was shown in Fig.4-1. Weed amount of mulching was markedly less than the control, and weed amount of plastic film was more than biogas residue films. In the period of observation, weeds were flourished under the plastic film or even broke plastic mulch. Weeds mainly grew from transplanted hole and rupture to all the treatments, and making the film rupture expands.

Fig. 4-1. The effect scene of different treatments on the weed amount in the case of cultivating eggplant

Study on Manufacturing Technology and Performance of Biogas Residue Film 287

compared with control, and decreased 77% as compared with the plastic film; weed growth amount of C biogas residue fibre film decreased 84% as compared with control, and decreased 79%as compared with the plastic film. From this, three kinds of residue fibre films

The soil moisture content of each treatment and analysis of variance of the soil moisture

tments A B C D E F 1 19.49 19.29 19.31 18.06 20.97 17.82 2 20.53 20.33 19.35 18.25 19.43 15.4 3 19.21 18.52 20.15 18.15 21.04 16.47 Mean 19.74 19.38 19.61 18.16 20.48 16.56

Source SS DF MS F P-value F0.05 Interval 0.2636 2 0.1318 0.1777 0.8398 4.1028 Treatments 29.7137 5 5.9427 8.0105 0.0028 3.3258

Table 4-6 showed that there were significant differences among treatments. Multiple

LSD0.05 LSD0.01

comparisons of the soil moisture content among treatments were shown in table 4-7.

Mean difference (%)

Table 4-7. Multiple comparisons of the soil moisture content among treatments

*<sup>i</sup> y <sup>i</sup> <sup>F</sup>* − *yy <sup>i</sup> <sup>E</sup>* − *yy <sup>i</sup> <sup>D</sup>* − *yy <sup>i</sup> <sup>C</sup>* − *yy <sup>i</sup> y* − *y*

A 19.74 3.18\*\* 0.74 1.58\* 0.13 0.36 1.56 2.23

The results showed that there were significant differences between three kinds of biogas residue fibre film, plastic film and control; there were significant differences between black film and control; there were significant differences between plastic film and black film. There were significant differences between A, C of biogas residue fibre film and black film;

had significant effect of suppressing weeds.

Interval\Trea

Treatment

**4.2 Effect of different treatments on soil moisture** 

Table 4-5. The soil moisture content of each treatment

Error 7.4187 10 0.7419

Table 4-6. Analysis of variance of the soil moisture content

B 19.38 2.82\*\* 1.1 1.22 0.23

C 19.61 3.05\*\* 0.87 1.45\*

Notes: The significance of symbols was as same as table 4-4.

D 18.16 1.6\* 2.32\*\*

E 20.48 3.92\*\*

F 16.56

Total 37.3960 17

content were respectively shown in table 4-5 and table 4-6.


The measured results of total weeds of each treatment were shown in table 4-2.

Table 4-2. The measured results of total weeds of each treatment

Analysis of variance of the weed amount was shown in table 4- 3.


Table 4-3. Analysis of variance of the weed amount

There were significant differences among the treatments, according to analysis of the multiple comparisons among treatments, seeing table 4-4.


Notes: *<sup>i</sup> y* was mean of the *i* treatment; LSD0.05 and LSD0.01was significant at 0.05, not significant at 0.01.

Table 4-4. Multiple comparisons of the weed amount among treatments

The results showed that there were significant differences between three kinds of biogas residue fibre film, black film and plastic film, control; there were significant differences between three kinds of biogas residue fibre films and black film. Weed amount of A biogas residue fibre film decreased 81% as compared with control, and decreased 75% as compared with the plastic film; weed amount of B biogas residue fibre film decreased 82% as compared with control, and decreased 77% as compared with the plastic film; weed growth amount of C biogas residue fibre film decreased 84% as compared with control, and decreased 79%as compared with the plastic film. From this, three kinds of residue fibre films had significant effect of suppressing weeds.
